cornell



(No Model.)

J. M. CORNELL. SKYLIGHT VENTILATING SASH BAR. 110.418,169. Patented Deo.31, 1889'.

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UNTTED STATES PATENT OFFICE.

JOHN M. CORNELL, OF NEIV YORK, N. Y.

SKYLIG HT VENTILATING SASH-BAR.

SPECIFICATION forming part of Letters Patent No. 418,169, dated December31, 1889.

Application filed August 2, 1889. Serial No. 319,487. (No model.)

To a/ZZ whom, it may 0071/067411..`

Be it known that I, JOHN MILTON CORNELL, a citizen of the United States`and' a resident of New York, in the beate of New York, have invented anew and useful Improvement in Skylight Ventilating Sash-Bars, of whichthe following is a specification.

This invention relates to those fire-proof skylights in which plates ofglass are supported and fastened by metallic bars; and it consists insuch a skylight-bar provided with air-vents, and in the combinationtherewith of a combined Ventilating cap and keeper above the glass, andcombined spacing-studs and fastening-bolts provided with screw-nuts andwashers above the crown of the cap, as hereinafter set forth andclaimed.

A sheet of drawings accompanies this specification as part thereof.

Figure l of these drawings represents vertical sections through askylight in two parallel longitudinal planes, and Figs. 2 'and 3represent cross-sections on the lines 2 2 and 3 3, Fig. yl,respectively.

Like letters of reference indicate corresponding parts in the severalfigures.

My skylight-bars l, are arranged in customary manner, so as to supportthe adjoining edges of plates G of suitable glass upon longitudinalshoulders s, provided for this purpose. Immediately below the plane ofthe latter the customary drip-gutters d cl provide for carrying off anydrip of Water due to leakage or condensation. The central npright web ofthe bar is composed of parallel sub-bars b b with an air-spaceabetween,into which vent-holes fu in the bottom of the bar open at suitableintervals for the escape of air upward into and through said space a, asindicated in Figs. 'l and 2. A combined ventilating-cap and keeper C, ofarched shape, rests upon the glass on each side of the bars b l) andextends over their upper edges, so as to leave a clear air-space a2above and outside of them, and this cap, as it is hereinafter termed, isprovided at suitable intervals with hooded lateral vent-Openings fr?,which are conveniently formed by punching out semicircular portions ofthe sheet metal with the 1curve downward and displacing outward thepartly-severed metal to the required extent. The sub-bars whichconstitute each skylightbar B are rigidly united, and the cap C isattached thereto and fastened down upon the glass G, as shown at theright in Fig. 1 and by Fig. 3, by means of studs S with the aid ofrivets r, nuts a, and Washers fw, said studs being riveted endwise tothe bottom bar, as shown at r2, between the vent-holes o and at suitabledistances apart. twelve inches is considered sufficient.

Having thus described the said skylight Ventilating sash-bars, I claimas my iuven tion and desire to patent under this specification# 1. Askylight-bar having laterally-projecting glass-supporting shoulders anddrip-gutters and provided at bottom with vent-holes between said gutters4and with an air-space in its vertical web communicating with saidVent-holes and with the outer air, subst-antially as hereinbeforespecified.

2. A skylight-bar having vent-holes in its bottom and an air-space inits vertical web communicating therewith, in combination with aVentilating-cap and glass-holder of arched shape, forming an air-spacein communication with the air-space of the bar and provided with hoodedlateral \-'ent-openings, substantially as hereinbefore specified.

3. A skylight-bar composed of a bottom bar provided with vent-holes anda pair of vertical bars with a space between, in combination with asuperposed Ventilating-cap and glass-holder having lateral vent-openings, and vertical studs within said space to which the several parts ofthe bar and said cap are attached, substantially as hereinbeforespecified.

J. M.. CO RN E l/L.

Witnesses:

1I. (l. Tunis, II. A. CARROLL.

One stud every i

